Loans - Impaired Loans with Associated Allowance (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Unpaid principal balance
With no related allowance	$ 7,263	$ 6,646
With an allowance	6,122	6,385
Total individually evaluated impaired loans	13,385	13,031
Recorded investment
With no related allowance	7,161	6,545
With an allowance	5,194	5,206
Total individually evaluated impaired loans	12,355	11,751
Specific reserves	2,852	2,823
SBA loans held for investment
Unpaid principal balance
With no related allowance	634	606
With an allowance	34	35
Total individually evaluated impaired loans	668	641
Recorded investment
With no related allowance	533	506
With an allowance	4	4
Total individually evaluated impaired loans	537	510
Specific reserves	4	4
Commercial loans
Unpaid principal balance
With no related allowance	2,423	1,564
With an allowance	3,248	3,805
Total individually evaluated impaired loans	5,671	5,369
Recorded investment
With no related allowance	2,422	1,563
With an allowance	2,350	2,657
Total individually evaluated impaired loans	4,772	4,220
Specific reserves	2,349	2,615
Commercial loans | Real Estate Loan [Member]
Unpaid principal balance
With no related allowance	2,327	1,493
With an allowance	961	973
Total individually evaluated impaired loans	3,288	2,466
Recorded investment
With no related allowance	2,327	1,493
With an allowance	127	126
Total individually evaluated impaired loans	2,454	1,619
Specific reserves	126	125
Commercial loans | Consumer other
Unpaid principal balance
With no related allowance	96	71
With an allowance	2,287	2,832
Total individually evaluated impaired loans	2,383	2,903
Recorded investment
With no related allowance	95	70
With an allowance	2,223	2,531
Total individually evaluated impaired loans	2,318	2,601
Specific reserves	2,223	2,490
Residential mortgage loans
Unpaid principal balance
With no related allowance	1,369	1,630
With an allowance	1,777	1,632
Total individually evaluated impaired loans	3,146	3,262
Recorded investment
With no related allowance	1,369	1,630
With an allowance	1,777	1,632
Total individually evaluated impaired loans	3,146	3,262
Specific reserves	224	80
Consumer loans | Home equity
Unpaid principal balance
With no related allowance	200	210
With an allowance	427	427
Total individually evaluated impaired loans	627	637
Recorded investment
With no related allowance	200	210
With an allowance	427	427
Total individually evaluated impaired loans	627	637
Specific reserves	56	56
Residential construction loans
Unpaid principal balance
With no related allowance	2,637	2,636
With an allowance	636	486
Total individually evaluated impaired loans	3,273	3,122
Recorded investment
With no related allowance	2,637	2,636
With an allowance	636	486
Total individually evaluated impaired loans	3,273	3,122
Specific reserves	$ 219	$ 68